Will some one please tell me if I've got this right.

If I make 5 bets at $1.00 each,
Total stake $5.00
2 of my selections win, returning $4.50 and $3.50.
Total return $8.00.
Take out orignal stake ($5.00) leaving a $3.00 profit.
POT = %60
S/R = %40

POT = profit ($3.00) divided by stake ($5.00) multiplied by 100.

S/R = wins (2) divided by bets (5) multiplied by 100.

If this is wrong will you please make the required corrections.
Thanks.
Mike.